由于这篇文章，我终于找到了解决方案。这是代码：
import android.app.Activity;import android.os.Bundle;import android.webkit.WebResourceError;import android.webkit.WebResourceRequest;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.Toast;import android.annotation.TargetApi;public class Main extends Activity { private WebView mWebview ; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mWebview = new WebView(this); mWebview.getSettings().setJavascriptEnabled(true); // enable javascript final Activity activity = this; mWebview.setWebViewClient(new WebViewClient() { @SuppressWarnings("deprecation") @Override public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) { Toast.makeText(activity, description, Toast.LENGTH_SHORT).show(); } @TargetApi(android.os.Build.VERSION_CODES.M) @Override public void onReceivedError(WebView view, WebResourceRequest req, WebResourceError rerr) { // Redirect to deprecated method, so you can use it in all SDK versions onReceivedError(view, rerr.getErrorCode(), rerr.getDescription().toString(), req.getUrl().toString()); } }); mWebview .loadUrl("http://www.google.com"); setContentView(mWebview ); }}
